Thanks for the endorsement Alan
![Happy :)](./images/smilies/smile.gif)
Scott,
It looks to me that you are throwing the head back a bit mid-swing. 9 times out of 10, this causes the vaulter to tense in the shoulders and apply downward force that causes the swing to break. Watch how your hands come down slightly while you swing, instead of pressing up in a hollow-body position. You can easily see that tension on the vaults you bailed out of.
First, make sure that your head position is correct at takeoff, slightly above neutral. Often, vaulters will look down at the box, which leads to head throwing. Then, your cue should be to "watch the vault." You should see yourself swinging, and be able to look at your feet when fully inverted.
And if possible, try to include your approaches in your next video.